A semi-loyal subscriber has argued that the data shows that flying on an airplane carries a very low risk of being infected by Covid-19, and there is reported data to confirm this argument. It is meet to note this argument did not discount the likelihood of spread or becoming infected while in the airport. But it is also meet to note, as noted in the WSJ, that: Those who have "studied the passenger cabin and the ventilation system fairly rigorously ... [have offered] a warning that even research published this year was done with earlier variants of Covid-19 circulating, not the more contagious Delta variant.” In addition, “[t]he review of the data also ... include[d] one big caveat: The quality of evidence from most published studies was low because of weak contact tracing. With new information, travel-health experts are raising new questions about airline procedures.”
PS: One of the myths the airline industry has sold to the public is that flying is safer than driving or riding in a car. As the authors of Freakonomics conceded in an email exchange with us and as did the author of WSJ article, it all turns on how one measures "safety." Thus, flying is safer than driving when measured in terms of fatalities per year and even taking account of the far greater overall passenger miles in car travel. But if, rather, than considering passenger miles to be the denominator, one considers trips to be the denominator, it becomes clear that car travel is much safer. Specifically, there are only about 20,000 flights per day in the U.S., and once a plane takes off, the number of passenger miles flown tends to be irrelevant as to whether or not any such flight will result in a fatal crash. At the same time, there are over 100 million car trips taken per day in the U.S., and the longer any trip, the greater the likelihood of a fatal crash. So, if one divides fatalities by trips/flights instead of by passenger miles, it is at least arguable that flying is indeed more dangerous than driving. Two caveats: Travel by air has become safer as the years progress; and one might be prudent to take a skeptical view of anything the airlines say.
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